The maximum charging distance of the Qi wireless charger is about 10 millimeter. Therefore, a protective sleeve can also be recharged, without the need to remove the phone to fill it.

With the development of Qi standard iteration, the cost of wireless charging technology has been gradually reduced, and more and more products are available around 100 yuan, and its experience cost is low. At present, HUAWEI has begun to add wireless charging to its products. It can be expected that the wireless charging function will be more popular in the next two years.